EP3555352A1 - Bobine débitrice de fil à friction - Google Patents
Bobine débitrice de fil à frictionInfo
- Publication number
- EP3555352A1 EP3555352A1 EP17829163.9A EP17829163A EP3555352A1 EP 3555352 A1 EP3555352 A1 EP 3555352A1 EP 17829163 A EP17829163 A EP 17829163A EP 3555352 A1 EP3555352 A1 EP 3555352A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- threads
- rollers
- friction
- deflecting element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/48—Thread-feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
- B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
- B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
- B65H51/12—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements in spaced relation to provide a series of independent forwarding surfaces around which material is passed or wound
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
- D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns
- D04B9/30—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns by striping
Definitions
- the invention relates to a friction feeder of a multi-filament knitting machine, in particular a circular knitting machine with ringing device.
- FIG. 1 shows a schematic side view of the thread guide at a single knitting point in such a conventional circular knitting machine with ringing device 5.
- the thread to be processed is the knitting point 6 via a thread monitor
- a Fadenleitring 4 supplied from a feeder 2 which subtracts the yarn via a thread feed 1 from a yarn package and thereby additionally ensures that a suitable yarn tension is maintained.
- the required thread tension initially depends on the thread material used. In jacquard knitting machines, moreover, the decrease of the thread at the knitting point varies, which causes variations in the thread tension. The feeder has to compensate for these fluctuations as much as possible.
- Conventional friction feeders include a drive roller, which also serves as a storage and transport role for the thread. This takes up the yarn fed from a yarn package and is wrapped by this one or more times. Driven by the active rotation of the roller, the thread is then fed to the knitting point. The transmission of the driving force of the roller on the thread takes place by friction on the roller surface. The speed of the thread is thus at most as large as the tangential speed of the transport roller with a friction feeder. Positive, slip-free yarn feeding is when the yarn speed is equal to the tangential velocity. The required friction on the roller surface is first ensured by the choice of a suitable friction material as friction lining for the roller surface.
- the friction causing the thread transport then depends on the friction coefficients of the friction lining material and the thread material and on the wrap angle of the thread around the transport roller.
- the wrapping angle can be adjusted by the number of wraps of the thread around the transport roller and determines the contact surface or length of contact of the thread with the roller surface (a wrap angle of 360 ° corresponds to a full loop).
- a Fritationsfournisseer satisfying these requirements should thus allow a variable adaptation of the friction forces to different thread materials in a manner that allows both a uniform transport of each thread when it is being processed at the knitting point, as well as a sliding past the roller surface on the unneeded threads ,
- the yarn guide of DE 35 06 552 A1 act as deflection that take the thread from each other or from the transport roller, deflect it and send it back to the transport roller or on the other thread guide. Since the thread windings continue to run around the transport roller around, albeit in a partially extended by the thread guide bow, the deflection angles occurring at the thread guides are large. This has the consequence that counteract the thread guide caused by the frictional forces arising in the deflections of the transferred from the transport roller surface on the thread feed force, which has a negative effect not only on the effectiveness of the yarn transport itself but also on the Maintaining a uniform thread tension by the feeder. Thread tension irregularities, in turn, can cause inaccuracies or errors in knitting processing which, in turn, result in defects in the fabric being processed. Furthermore, the setting of the yarn transport in DE 35 06 552 A1 due to the many adjustable yarn guide whose relative positioning is critical to each other, complicated for the operator.
- Fritationsfournisseur defined in claim 1 solves the above problem in that the thread once or twice wrapped around two parallel transport rollers and a deflection deflects the thread in a portion of the thread path between the transport rollers.
- one of the deflection elements is positioned in such a way that it deflects the respective thread outwards from the inside of its wraps, this reduces the wrap angle.
- the contact length of thread and roller surfaces and thus the force exerted on the thread friction force are reduced.
- the roller surfaces slide past the thread.
- the wrap angle is increased.
- the extension of the con- Cycle of thread and friction lining on the roller surface leads to an increased frictional force and thus to an improved thread transport.
- Deflection elements for the various threads are also controlled in operation so that the wrap angle is sufficiently increased for the thread to be processed, while the wrap angle for the unneeded threads are kept sufficiently small.
- the position control can be done continuously or in discrete stages. Optimally, the position control takes place automatically and is coordinated with the control of the ringing device.
- each of the deflecting elements is fed by a transport roller on one side of the deflecting element, in order then to be passed on to the second transport roller on the other side of the deflecting element.
- the deflection angles occurring at the deflecting elements are kept small.
- the smaller deflection angles result in lower frictional disturbances and lead to an improved maintenance of the feed force exerted by the feeder on the thread with uniform thread tension.
- This advantageous effect can be further improved by the deflecting elements are designed as co-rotating roles.
- Suppliers often contain resilient thread guide elements, of which, for example, fluctuations in yarn consumption can be compensated as instantaneous.
- This function can be completely or partially filled by the deflecting elements in the friction feeder of the present invention, if they are each arranged resiliently, for example by being held by resilient brackets rotatable about a pivot.
- the transport rollers may have the same diameter or different diameters. It is also conceivable that they have sections of different diameters, wherein the sections each lead different threads. They can be operated at the same speed or at different speeds.
- a lying arrangement has the advantage that the wraps of the threads on the rollers can not fall down or slide on the roller. In this way, the threads run safely next to each other without being confused.
- the friction feeder of the present invention can be applied to various types of knitting machines that process a plurality of threads under a certain tension. These are primarily circular knitting machines with ringing device, which work with or without jacquard technology. Especially with knitting machines with jacquard technique, the positive effect of the present invention on the thread tension is particularly advantageous. However, it is also conceivable to use the feeder in other knitting, knitting, weaving or sewing machines with multiple threads.
- Figure 1 is a schematic view of the structure of a conventional circular knitting machine with ring function, showing the yarn path from a yarn package on the conventional Fritationsfournisseur to knitting;
- Figure 2 is a perspective view of a Fritations- supplier according to the invention with mounted in a perforated strip deflecting elements and for reasons of clarity with only one transported thread;
- Figure 3 is a side view of the Fritationsfournisseurs of Figure 2;
- Figure 4 is a perspective view of another Fritationsfournisseurs invention with attached to flexible hangers deflecting elements and with two transported threads;
- Figure 5 is a perspective view of a yarn guide variant with minimumPolumschlingungswinkel with two wraps around the transport rollers;
- Figure 6 is a schematic representation of the yarn guide variant with minimalPolumschlingungswinkel from Figure 5;
- Figure 7 is a schematic representation of a yarn guide variant with averagePolumschlingungswinkel with two wraps around the feed rollers;
- Figure 8 is a perspective view of a yarn guide variant with averagePolumschlingungswinkel without deflection
- 9 is a perspective view of a yarn guide variant with maximumPolumschlingungswinkel in two wraps around the transport rollers.
- FIG. 10 a schematic representation of the thread guiding variant with maximum total wrap angle from FIG. 9.
- Figure 1 1 is a perspective view of the yarn guide variants of Figures 5, 7 and 9 in a common view
- Figure 12 is a perspective view of a yarn guide variant with two transported threads which wrap around the transport rollers twice;
- the friction feeder according to the invention has two transport rollers 1 1, 12, which are lying, i. with horizontal axes, held parallel to each other.
- the transport rollers are arranged one above the other, whereby access to them is simplified; but it is also possible a parallel arrangement next to each other or at an angle to each other.
- the transport rollers have the same roller diameter and are both driven at the same speed. However, there are also transport rollers of different diameters conceivable that may be driven at different speeds.
- the transport rollers each have corresponding subdivisions for the respective threads.
- the transport rollers of a friction conveyor according to the invention in a circular knitting machine with ringing device in the axial direction are longer than the transport rollers shown in FIGS. 2 and 3.
- the threads (in Figures 2 and 3 for illustrative purposes, only one thread) Then run each of their yarn spools successively on both transport rollers, before they continue to lead to ringing device. They can wrap the transport rollers one or more times.
- the Fritationsfournisseur in Figures 2 and 3 provides at least one deflecting element 13, which deflects a yarn to be transported in its course between the two transport rollers 1 1, 12.
- the deflecting element 13 can either be arranged so that it the yarn course inwards, i. in the direction of the interior of a wrap of both transport rollers, deflects or deflects it outwards and thus increases or reduces the wrap angle of the thread around the transport rollers.
- the deflecting element 13 can be arranged to be adjustable in particular in the direction perpendicular to the connection of the roller centers and the roller axes, for example by attachment to a perforated strip 15 as shown in FIGS. 2 and 3.
- the perforated strip 15 allows differently strong deflections of the thread inwards or outwards.
- the deflecting element 13 is preferably itself designed as an at least passively rotating roller. If the transport rollers are looped several times by the corresponding thread, the thread can be guided around the deflecting element so that only one, several or all of the wrappings are deflected. If more than two threads are processed, then a plurality of threads are guided side by side on the subdivisions of the transport rollers. It can also be provided a plurality of deflection, for example, one for each thread (or two per thread to facilitate the deflection of each thread either inward and outward).
- a compensating element 20 (see FIG. 3) is generally provided which can pick up or store the subsequent thread until the positive thread transport by means of appropriate Conversion of the deflection has come to a standstill.
- a compensating element can be realized, for example, by a laterally abutting the spring element spring that is slightly biased against the thread and this deflects at a suddenly decreasing thread tension to the outside and keeps under tension. In this way, the unwanted spooling of the thread around the transport rollers following excessive re-shooting can be prevented.
- FIG. 4 shows a variant with deflection elements 13 ', 14' held on brackets 17, 18 via a pivot pin 16.
- this variant can be applied by appropriate broadening of the transport rollers 1 1, 12, the deflecting elements 13 ', 14' and the ironing pin 16 to any number of threads to be processed.
- the stirrups 17, 18 are at least slightly resilient, so that the deflecting elements 13 ', 14' held against them can yield slightly to the tension of the deflected thread, which has an advantageous effect on the uniformity of the thread tension.
- the positioning of the deflecting elements 13 ', 14' by means of the stirrups 17, 18 can, in contrast to the perforated strip 15 of FIGS. 2 and 3, take place continuously.
- the control of the bracket 17, 18 can be automated, in particular in accordance with the control of the ringing device.
- a deflecting element held within and outside the loop can be provided for each thread.
- deflections of the respective thread to the outside to reduce the wrap angle (and shorten the contact length with the friction linings), ie also deflections are then detected inside to increase the wrap angle (and lengthening the contact length) possible.
- the attachment of the bracket 17, 18 on the pivot pin 16 is merely an exemplary mounting variant. It can also be provided several trunnions or wholly other other support options. Especially in the case that the straps are controlled in coordination with the ring device, the attachment and support must be designed so that an individual and automatic control of the strap is made possible.
- FIGS. 5 to 10 show different variants of the guidance of a thread by corresponding adjustment of the deflecting elements in the friction feeder according to the invention in order to demonstrate the possibilities for controlling the transmission of the frictional force in the present invention.
- the thread wraps around the transport rollers 1 1, 12 two times, and the deflecting element 13 is attached to a perforated strip 15.
- Figures 6, 7 and 10 show schematic views of the thread pattern, in which the thread pattern is subdivided into four different phases 1 to 4 for better understanding.
- the thread first passes past the upper transport roller 1 1 to the deflecting element 13 (phase 1) arranged at an outermost position a of the perforated strip 15, from which it reaches the lower transport roller 12 is diverted. It wraps around it at an angle of 135 ° (phase 2), before it is returned in the direction of the upper transport roller 1 1. This he wraps around again at an angle of 135 ° (phase 3). Once again via the deflection element 13 at the outermost position, it returns to the lower transport roller 12, which it wraps around at an angle of 45 ° (phase 4), before it is guided further in the direction of the knitting point:
- FIG. 6 minimum total wrap angle Phase looped roll wrap angle
- the total wrap angle on both transport rollers is 315 ° in this example. With two wraps and the two possible positions of the deflecting elements indicated in the figure, this is the minimum wrap angle.
- FIG. 7 is a schematic view of a further variant with another thread guide over the deflection element with two wraps around the transport rollers. While one of these two wraps is deflected by the deflecting element 13 which in turn is arranged at an outermost position a, the other runs directly from one transport roller to the other. This results in a mean total wrap angle of 405 °:
- FIGS. 9 and 10 show a corresponding example with a maximum overall wrap angle of 675 ° in the case of two wraps which are respectively deflected by the deflection element 13 arranged at an innermost position b:
- the adjustment parameters are primarily the number of deflected Fadenumschlingungen and the position of the or the deflection.
- the maximum Intelschliesungswinkel in Figure 9 of 675 ° is more than twice as high as the minimum angle of 315 ° in the example in Figure 5.
- the contact length of thread and friction linings and the force exerted on the thread friction force are much greater.
- FIG. 11 illustrates, in a single illustration, the three possibilities of thread guidance considered above from one transporting roller 11 to the other transporting roller 12.
- the thread can be deflected outwards via the deflecting element 13 at the outermost position a to minimize the wrapping angle (Variant A), or be deflected inwards via the deflection element 13 at the innermost position b to maximize the wrap angle (variant B).
- Variant C When passing through the thread without deflection the Umlenkelennent 13 remains without function (variant C).
- FIG. 11 with the three different thread guides in the execution and only one in the return direction does not represent a real configuration of the feeder but merely serves to jointly illustrate the various alternative thread guide variants.
- FIG. 12 shows an example in which two threads are each guided twice over the same deflection element 13 'in such a way that their respective angles of wrap are minimized. That is, the thread guides correspond respectively to the variant shown in Figures 5 and 6.
- This setting is useful, for example, if both threads are made of the same material, for which it has been shown that the best way to ensure with reduced wrap angle is that the thread to be processed is reliably transported and the transport roller surface slides past the respective other thread.
- the example of FIG. 12 can be expanded to any number of threads, which are then transported by the same deflecting element or by different deflecting elements with identical or different thread guiding variants.
- the thread guides can also be controlled synchronously with the control of the ringing device so that the wrap angle is increased for newly processed threads, while the wrap angle for a straight clamped thread is reduced.
- the deflection control between deflection can vary outwards and inwards.
- thread guides are only exemplary. By appropriate changes in position of the deflecting elements as well as by changing the number of wraps can be the range of possible total wrap angles is almost unlimited. As already shown in the examples, a thread in one of its wraps can be deflected by one deflecting element, while it is guided in another loop around another deflecting element (or none at all).
- the operation of the friction feeder of the present invention will be described using examples of one and two processed threads.
- it is particularly suitable for use in circular knitting machines with ringing device, which each process more than two different threads at their knitting points.
- the operation of the feeder remains basically the same as in the examples described above.
- the friction feeder of the present invention can also be used in other textile processing machines in which different threads are used, so that the sliding frictional force required for the respective threads can be set as flexibly as possible without expensive material exchange.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016015018.1A DE102016015018A1 (de) | 2016-12-16 | 2016-12-16 | Friktionsfournisseur |
PCT/EP2017/082580 WO2018108989A1 (fr) | 2016-12-16 | 2017-12-13 | Bobine débitrice de fil à friction |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3555352A1 true EP3555352A1 (fr) | 2019-10-23 |
Family
ID=60972188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17829163.9A Withdrawn EP3555352A1 (fr) | 2016-12-16 | 2017-12-13 | Bobine débitrice de fil à friction |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3555352A1 (fr) |
JP (1) | JP2020502382A (fr) |
CN (1) | CN110073043A (fr) |
DE (1) | DE102016015018A1 (fr) |
TW (1) | TW201825730A (fr) |
WO (1) | WO2018108989A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1027360B1 (nl) * | 2019-06-12 | 2021-01-20 | Vandewiele Nv | Garenvoedingsmodule |
CN110498293B (zh) * | 2019-08-23 | 2020-07-28 | 西安交通大学 | 一种可调温防粘预浸丝束减张输送装置 |
CN110498292B (zh) * | 2019-08-23 | 2020-07-28 | 西安交通大学 | 基于大包角和高摩擦系数纤维丝束低张力输送装置及方法 |
CN110760989B (zh) * | 2019-11-08 | 2021-01-26 | 西安工程大学 | 一种横机氨纶纱线控制器 |
CN114275616B (zh) * | 2021-11-24 | 2024-01-16 | 浙江谋皮环保科技有限公司 | 可延长盘条导辊寿命的盘条组输送高度调节方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2641913A (en) * | 1947-04-15 | 1953-06-16 | Poron Ets | Yarn feeding method and apparatus for knitting machines |
GB951728A (en) * | 1962-03-10 | 1964-03-11 | Spinner Oy | Thread-feeding device |
JPS60188272A (ja) | 1984-03-06 | 1985-09-25 | Fukuhara Seiki Seisakusho:Kk | 編機における積極型の糸送り装置 |
DE4131322A1 (de) * | 1991-09-20 | 1993-03-25 | Stoll & Co H | Fadenliefervorrichtung |
DE4240710A1 (de) * | 1992-12-03 | 1994-06-09 | Iro Ab | Verfahren zum Steuern eines Fadenliefersystems und Fadenliefersystems |
DE19546404A1 (de) * | 1995-12-12 | 1997-06-19 | Terrot Strickmaschinen Gmbh | Fadenliefervorrichtung |
US5669245A (en) * | 1996-03-08 | 1997-09-23 | Shieh; Meei-Ju | Yarn feeding device of a circular knitting machine |
DE19708139A1 (de) * | 1997-02-28 | 1998-09-03 | Erich Roser | Fadenliefervorrichtung, insbesondere für Strick- und Wirkmaschinen |
DE102013202879A1 (de) * | 2013-02-21 | 2014-08-21 | Mall + Herlan Schweiz Ag | Zuführvorrichtung und Verfahren zur sukzessiven Zuführung |
CN104692191A (zh) * | 2015-03-23 | 2015-06-10 | 江苏占姆士纺织有限公司 | 一种新型摩擦式的筒纱退绕装置 |
-
2016
- 2016-12-16 DE DE102016015018.1A patent/DE102016015018A1/de not_active Withdrawn
-
2017
- 2017-12-13 CN CN201780077031.9A patent/CN110073043A/zh active Pending
- 2017-12-13 JP JP2019532006A patent/JP2020502382A/ja not_active Withdrawn
- 2017-12-13 EP EP17829163.9A patent/EP3555352A1/fr not_active Withdrawn
- 2017-12-13 WO PCT/EP2017/082580 patent/WO2018108989A1/fr unknown
- 2017-12-15 TW TW106144199A patent/TW201825730A/zh unknown
Also Published As
Publication number | Publication date |
---|---|
DE102016015018A1 (de) | 2018-06-21 |
WO2018108989A1 (fr) | 2018-06-21 |
CN110073043A (zh) | 2019-07-30 |
JP2020502382A (ja) | 2020-01-23 |
TW201825730A (zh) | 2018-07-16 |
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